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(#) Incorrect ObjectAnimator Property

!!! ERROR: Incorrect ObjectAnimator Property
   This is an error.

Id
:   `ObjectAnimatorBinding`
Summary
:   Incorrect ObjectAnimator Property
Severity
:   Error
Category
:   Correctness
Platform
:   Android
Vendor
:   Android Open Source Project
Feedback
:   https://issuetracker.google.com/issues/new?component=192708
Since
:   2.3.0 (March 2017)
Affects
:   Kotlin and Java files and resource files
Editing
:   This check runs on the fly in the IDE editor
Implementation
:   [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-checks/src/main/java/com/android/tools/lint/checks/ObjectAnimatorDetector.kt)
Tests
:   [Source Code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/ObjectAnimatorDetectorTest.kt)

This check cross references properties referenced by String from
`ObjectAnimator` and `PropertyValuesHolder` method calls and ensures
that the corresponding setter methods exist and have the right
signatures.

(##) Example

Here is an example of lint warnings produced by this check:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text
src/main/java/AnimationExample.java:9:Error: The setter for this
property does not match the expected signature (public void setProp2(int
arg) [ObjectAnimatorBinding]
    ObjectAnimator animator2 = ObjectAnimator.ofInt(myObject, "prop2", 0, 1, 2, 5);
                                                              -------
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Here is the source file referenced above:

`src/main/java/AnimationExample.java`:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~java linenumbers
import android.animation.ObjectAnimator;

public class AnimationExample {
    public void startAnimations() {
        Object myObject = new MyObject();
        ObjectAnimator animator1 = ObjectAnimator.ofInt(myObject, "prop1", 0, 1, 2, 5);
        animator1.start();

        ObjectAnimator animator2 = ObjectAnimator.ofInt(myObject, "prop2", 0, 1, 2, 5);
        animator2.start();
    }

    private static class MyObject {
        public void setProp1(int x) {
            // Implementation here
        }

        private void setProp2(float x) {
            // Implementation here
        }
    }
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

You can also visit the
[source code](https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:lint/libs/lint-tests/src/test/java/com/android/tools/lint/checks/ObjectAnimatorDetectorTest.kt)
for the unit tests for this check to see additional scenarios.

(##) Suppressing

You can suppress false positives using one of the following mechanisms:

* Using a suppression annotation like this on the enclosing
  element:

  ```kt
  // Kotlin
  @Suppress("ObjectAnimatorBinding")
  fun method() {
     ofInt(...)
  }
  ```

  or

  ```java
  // Java
  @SuppressWarnings("ObjectAnimatorBinding")
  void method() {
     ofInt(...);
  }
  ```

* Using a suppression comment like this on the line above:

  ```kt
  //noinspection ObjectAnimatorBinding
  problematicStatement()
  ```

* Adding the suppression attribute
  `tools:ignore="ObjectAnimatorBinding"` on the problematic XML
  element (or one of its enclosing elements). You may also need to add
  the following namespace declaration on the root element in the XML
  file if it's not already there:
  `xmlns:tools="http://schemas.android.com/tools"`.

  ```xml
  &lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;android.support.constraint.motion.MotionLayout xmlns:tools="http://schemas.android.com/tools"
      tools:ignore="ObjectAnimatorBinding" ...&gt;
    ...
  &lt;/android.support.constraint.motion.MotionLayout&gt;
  ```

* Using a special `lint.xml` file in the source tree which turns off
  the check in that folder and any sub folder. A simple file might look
  like this:
  ```xml
  &lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;lint&gt;
      &lt;issue id="ObjectAnimatorBinding" severity="ignore" /&gt;
  &lt;/lint&gt;
  ```
  Instead of `ignore` you can also change the severity here, for
  example from `error` to `warning`. You can find additional
  documentation on how to filter issues by path, regular expression and
  so on
  [here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html).

* In Gradle projects, using the DSL syntax to configure lint. For
  example, you can use something like
  ```gradle
  lintOptions {
      disable 'ObjectAnimatorBinding'
  }
  ```
  In Android projects this should be nested inside an `android { }`
  block.

* For manual invocations of `lint`, using the `--ignore` flag:
  ```
  $ lint --ignore ObjectAnimatorBinding ...`
  ```

* Last, but not least, using baselines, as discussed
  [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).

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